Nutrient compositions of cultured Skeletonema costatum,Chaetoceros curvisetus,and Thalassiosira nordenskildii  

作　　者：潘胜军 沈志良 刘文萍 韩笑天 苗辉 马海青 

机构地区：[1]Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences [2]Graduate University of Chinese Academy of Sciences [3]Rizhao Entry-Exit Inspection and Quarantine Bureau of P.R.China

出　　处：《Chinese Journal of Oceanology and Limnology》2010年第6期1131-1138,共8页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.40776043);National Natural Science Foundation of China for Creative Research Groups (No. 40821004)

摘　　要：We cultured different-sized fractions of dominant phytoplankton species, Skeletonema costatum, Chaetoceros curvisetus, and Thalassiosira nordenskioldii, collected in different sea areas in various seasons, and measured and compared their C, N, P, Si contents. The N content of these species is similar, while the C, P, and Si contents of S. costatum from eutrophic Changjiang （Yangtze River） estuary are higher than those from Jiaozhou Bay （JZB）, particularly the content of Si. The C, N, P, and Si contents of cultured phytoplankton in JZB increase with size fraction augmentation, and the percentages of C, N, and P follow the same trend, while the percentage of Si remain constant. Moreover, S. costatum from small-sized fraction assimilated Si more easily than C. curvisetus and T. nordenskirldii, which is explained by the dominance of S. costatum under the conditions of low SiO3-Si concentration in JZB. The C, N, P, and Si contents of cultured S. costatum collected during summer and winter are higher, which is consistent with the phytoplankton blooming seasons in JZB. The SiO3-Si concentration of seawater during spring restrain the growth of phytoplankton, supported by the fact that the N, P, and Si contents and their ratios in cells of cultured S. costatum are low in spring season.We cultured different-sized fractions of dominant phytoplankton species,Skeletonema costatum,Chaetoceros curvisetus,and Thalassiosira nordenski ldii,collected in different sea areas in various seasons,and measured and compared their C,N,P,Si contents.The N content of these species is similar,while the C,P,and Si contents of S.costatum from eutrophic Changjiang (Yangtze River) estuary are higher than those from Jiaozhou Bay (JZB),particularly the content of Si.The C,N,P,and Si contents of cultured phytoplankton in JZB increase with size fraction augmentation,and the percentages of C,N,and P follow the same trend,while the percentage of Si remain constant.Moreover,S.costatum from small-sized fraction assimilated Si more easily than C.curvisetus and T.nordenski ldii,which is explained by the dominance of S.costatum under the conditions of low SiO 3-Si concentration in JZB.The C,N,P,and Si contents of cultured S.costatum collected during summer and winter are higher,which is consistent with the phytoplankton blooming seasons in JZB.The SiO 3-Si concentration of seawater during spring restrain the growth of phytoplankton,supported by the fact that the N,P,and Si contents and their ratios in cells of cultured S.costatum are low in spring season.

关 键 词：nutrient compositions Skeletonema costatum Chaetoceros curvisetus Thalassiosira nordenskiOldii 

分 类 号：P734.44[天文地球—海洋化学]